﻿// Copyright 2016-2018 Confluent Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Refer to LICENSE for more information.

using System;
using System.Net.Http.Headers;
using System.Text;

namespace Confluent.SchemaRegistry
{
    /// <summary>
    ///     A HTTP authentication header value provider implementing the 'Basic' scheme.
    ///
    ///     See: https://datatracker.ietf.org/doc/html/rfc7617
    /// </summary>
    public class BasicAuthenticationHeaderValueProvider : IAuthenticationHeaderValueProvider
    {
        readonly AuthenticationHeaderValue authenticationHeader;

        /// <summary>
        ///     Initialize a new instance of the BasicAuthenticationHeaderValueProvider class.
        /// </summary>
        /// <param name="username">
        ///     The username
        /// </param>
        /// <param name="password">
        ///     The password
        /// </param>
        public BasicAuthenticationHeaderValueProvider(string username, string password)
        {
            authenticationHeader = new AuthenticationHeaderValue("Basic", Convert.ToBase64String(Encoding.UTF8.GetBytes($"{username}:{password}")));
        }

        /// <inheritdoc/>
        public AuthenticationHeaderValue GetAuthenticationHeader() => authenticationHeader;
    }
}
